Inmarsat Plc operates as a provider of global mobile satellite communications solutions. It offers a portfolio of solutions and value-added services for use on land, at sea and in the air. The company operates through five segments: Maritime, Government, Enterprise, Aviation and Central Services. The Maritime segment focuses on worldwide commercial maritime services. The Enterprise segment focuses on worldwide energy, industry, media, carriers and M2M services. The Aviation segment focuses on commercial aviation services. The U.S. Government segment focuses on U.S. civil and military government services. The Global Government segment focuses on worldwide civil and military government services. Inmarsat was founded on July 16, 1979 and is headquartered in London, the United Kingdom.